Poele



I06. COMPOSITIONS, I

COATING OR PLASTIC.

(No Model.)

0. J. VAN DEPOELE.

\. INSULATING MATERIAL.

No. 287,346. PatentedOct. 23, 1883 WITNESSES: v V mvEmoa W moazg.

a. was Mum mm a c.

LIO

7 1b all whom ntay concern: .4 Be it known that I, CHARLES J. VAN DE- POELE, of Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Insulating Material; and I do hereby declare that thefollowingis afull,

clear, and exact description thereof, reference being bad to the accompanying drawing,

which forms a part of this specification.

1 This invention relates to a new insulating material, particularly. adapted for use where much heat is generated, and it consists in the use of silicate of soda mixed with zinc-white 0 me as a f or re ea or 0 er uitable oxi 15 or earthy substances, in the manner hereinaf- 1 ter more fully described, and then pointed out in the claims.

' In describing my invention I will illustrate it as applied to the machine described in Let-v ters Patent No. 275,549, granted to me April 10, 1883, of which this application is a division. r V t In the accompanying drawing, A represents a. sectional view of. some of the iron disks of said machines," B, the copper strip through which the current passes, and G the collars keeping the disks a suitable distance apart.

These disks A are covered on both sides with paper D, impregnated with silicate of soda, .mixed zinc-white or red lead, or any other oxide or earthy material,which, uniting with the'silicate, renders the paper covering less liable to be affected by. heat. This paper is cemented to the disks on both sides with a similar composition, and will thus insulate all. the

7 INSULATING MATERIAL.

v disks'A from the copper strip B, and prevent.

srncirrcn'rroiv forming part of, Letters Patent 1%. 287,346, dated October 23, 1883. V I Application filed April 4, i883. (No model.)

ture by heat. r

4 In carrying out my invention I preferto mix or red lead, as

thus be found very useful, not only for its in-' -45 its ability to sulating-properties, but also for stand heat, which will be found very great, for f a lied between la ers of cotton-covered wire 1 sai wire were so ea e as o urn the co tton covering, the insulation of.the wire :50

would still be perfect.

proper earthy matters, and of a suitable consistency, it may be used without paper.

treated with a silicate for insulating purposes, and make no-claim to this. r

WhatI claim asnew and of my invention'is- V 1. The insulating compound herein described, consisting of silicate of soda mixed with earthy substances or metallic oxides, substantially as described.

2. As an insulating materiahpaper saturated with silicateoi sodamixed with earthy substances or metallic oxides, substantially as specified: a

7 CHARLES J. VAN DEPOELE.

Witnesses:

ALEXANDER J. R. FIEGO, 'lnno. P; BAILEY.

the destruction ofthe insulation of the arma-E A n:

Although I have shown the silicate-ofsoda compound used in connection with the paper, 4 1 it is'evident that by mixing the silicate with I- am aware that it is not new to use paper A 

